A few Google+ tips:- You can click on profile pictures to rotate through them. Nice find by +MG Siegler on that one.- In the stream, you can click 'j' to navigate down to the next item or 'k' to navigate up. I think it's the same keys that Gmail uses, which is probably in turn because +Paul Buchheit uses vi and created Gmail. :)- If you're sharing a post with a small circle of people, you can prevent resharing. Click the arrow at the top-right of the post and choose "Disable reshare."- One more: if you're looking for more fun things in your stream, the "Incoming" stream is stuff from people who are sharing with you, but who you haven't added to a circle.